Lady Gaga makes a quick appearance as an alien in Men in Black 3, but she's making her official acting debut in another film: Machete Kills.

Gaga just finished filming her role—as the mysterious Lady Chameleon—yesterday. According to director Robert Rodriguez, who Tweeted a poster of Gaga in character, "She kicked SO MUCH ASS! Holy Smokes. Blown Away!" And the pop star Tweeted of her part: "IM SO EXCITED!!! AH! Filming was insane."

The film, a sequel to Rodriguez's 2010 Machete, is set to be released next year and also stars Sofia Vergara, Jessica Alba, Mel Gibson, Amber Heard, and Zoe Saldana—with Danny Trejo in the title role.